Computer Simulation for the Cavitation Changes at the Exit of Offset Printing Nip

Jong-Tae Youn; Yun-Taek Kim; Soo-Man Lim

doi:10.7584/ktappi.2014.46.3.001

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2014 Vol.46, Issue 3 Next Page

Computer Simulation for the Cavitation Changes at the Exit of Offset Printing Nip 오프셋 인쇄의 틈새출구에서 공동의 변화에 대한 시뮬레이션

30 June 2014. pp. 1-10

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Abstract

Offset paper printing is a promising roll-to-roll technique for color printed materials. Although it is no doubt that understanding ink transfer mechanism in offset printing process is necessary to achieve high printing quality, investing the relationship between inks and substrates at the nip is difficult experimentally due to high printing speed. In this paper, rheological behavior and splitting point of the ink at the nip is studied using package software Ployflow and Flow 3D based on Navier-Stokes equation. Polydimethylsiloxane (PDMS) ink and IGT printability tester were used for an model ink and experiment to compare with that of simulation data, respectively. As a result, higher viscosity at state flow and pressure increased ink transfer due to higher possibility of presence of cavitation at the nip and increase in covering area ratio. These results have shown good agreements with experimental data compared by measuring density of print through.

Keywords

offset printing

paper

PDMS

cavitation

simulation

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 46
No :3
Pages :1-10
Received Date : 2014-04-02
Revised Date : 2014-05-19
Accepted Date : 2014-05-21
DOI :https://doi.org/10.7584/ktappi.2014.46.3.001

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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